A student is writing the introduction to an opinion piece about the benefits of a plant-based diet. Which sentence should he include in the introduction to most clearly present his topic?

Vegetarians choose to avoid eating meat for health reasons or for moral reasons.

Around the world, it is customary for people to share meals together.

Many of the medications that people use today are made from products found in nature.

The food pyramid is a graphic that shows how much of each food group to eat daily.